Answer the questions given below, keeping in mind the distinction between time period and frequency of sound waves.
(i) Define the time period of a sound wave.
(ii) Explain, with the help of a mathematical relation, how time period and frequency are connected.
(iii) A sound wave has a time period of 5ms. Without detailed calculation, state whether its pitch is higher or lower than that of another wave whose time period is 10ms. Give a brief reason for your answer.